Sure thing! We've got 85 and we're gonna multiply it by 239. That's the same as adding 85 to itself 239 times.
Step 1: 0 + 85 = 85
Step 2: 85 + 85 = 170
Step 3: 170 + 85 = 255
Step 4: 255 + 85 = 340
Step 5: 340 + 85 = 425
Step 6: 425 + 85 = 510
Step 7: 510 + 85 = 595
Step 8: 595 + 85 = 680
Step 9: 680 + 85 = 765
Step 10: 765 + 85 = 850
Step 11: 850 + 85 = 935
Step 12: 935 + 85 = 1020
Step 13: 1020 + 85 = 1105
Step 14: 1105 + 85 = 1190
Step 15: 1190 + 85 = 1275
Step 16: 1275 + 85 = 1360
Step 17: 1360 + 85 = 1445
Step 18: 1445 + 85 = 1530
Step 19: 1530 + 85 = 1615
Step 20: 1615 + 85 = 1700
Step 21: 1700 + 85 = 1785
Step 22: 1785 + 85 = 1870
Step 23: 1870 + 85 = 1955
Step 24: 1955 + 85 = 2040
Step 25: 2040 + 85 = 2125
Step 26: 2125 + 85 = 2210
Step 27: 2210 + 85 = 2295
Step 28: 2295 + 85 = 2380
Step 29: 2380 + 85 = 2465
Step 30: 2465 + 85 = 2550
Step 31: 2550 + 85 = 2635
Step 32: 2635 + 85 = 2720
Step 33: 2720 + 85 = 2805
Step 34: 2805 + 85 = 2890
Step 35: 2890 + 85 = 2975
Step 36: 2975 + 85 = 3060
Step 37: 3060 + 85 = 3145
Step 38: 3145 + 85 = 3230
Step 39: 3230 + 85 = 3315
Step 40: 3315 + 85 = 3400
Step 41: 3400 + 85 = 3485
Step 42: 3485 + 85 = 3570
Step 43: 3570 + 85 = 3655
Step 44: 3655 + 85 = 3740
Step 45: 3740 + 85 = 3825
Step 46: 3825 + 85 = 3910
Step 47: 3910 + 85 = 3995
Step 48: 3995 + 85 = 4080
Step 49: 4080 + 85 = 4165
Step 50: 4165 + 85 = 4250
Step 51: 4250 + 85 = 4335
Step 52: 4335 + 85 = 4420
Step 53: 4420 + 85 = 4505
Step 54: 4505 + 85 = 4590
Step 55: 4590 + 85 = 4675
Step 56: 4675 + 85 = 4760
Step 57: 4760 + 85 = 4845
Step 58: 4845 + 85 = 4930
Step 59: 4930 + 85 = 5015
Step 60: 5015 + 85 = 5100
Step 61: 5100 + 85 = 5185
Step 62: 5185 + 85 = 5270
Step 63: 5270 + 85 = 5355
Step 64: 5355 + 85 = 5440
Step 65: 5440 + 85 = 5525
Step 66: 5525 + 85 = 5610
Step 67: 5610 + 85 = 5695
Step 68: 5695 + 85 = 5780
Step 69: 5780 + 85 = 5865
Step 70: 5865 + 85 = 5950
Step 71: 5950 + 85 = 6035
Step 72: 6035 + 85 = 6120
Step 73: 6120 + 85 = 6205
Step 74: 6205 + 85 = 6290
Step 75: 6290 + 85 = 6375
Step 76: 6375 + 85 = 6460
Step 77: 6460 + 85 = 6545
Step 78: 6545 + 85 = 6630
Step 79: 6630 + 85 = 6715
Step 80: 6715 + 85 = 6800
Step 81: 6800 + 85 = 6885
Step 82: 6885 + 85 = 6970
Step 83: 6970 + 85 = 7055
Step 84: 7055 + 85 = 7140
Step 85: 7140 + 85 = 7225
Step 86: 7225 + 85 = 7310
Step 87: 7310 + 85 = 7395
Step 88: 7395 + 85 = 7480
Step 89: 7480 + 85 = 7565
Step 90: 7565 + 85 = 7650
Step 91: 7650 + 85 = 7735
Step 92: 7735 + 85 = 7820
Step 93: 7820 + 85 = 7905
Step 94: 7905 + 85 = 7990
Step 95: 7990 + 85 = 8075
Step 96: 8075 + 85 = 8160
Step 97: 8160 + 85 = 8245
Step 98: 8245 + 85 = 8330
Step 99: 8330 + 85 = 8415
Step 100: 8415 + 85 = 8500
Step 101: 8500 + 85 = 8585
Step 102: 8585 + 85 = 8670
Step 103: 8670 + 85 = 8755
Step 104: 8755 + 85 = 8840
Step 105: 8840 + 85 = 8925
Step 106: 8925 + 85 = 9010
Step 107: 9010 + 85 = 9095
Step 108: 9095 + 85 = 9180
Step 109: 9180 + 85 = 9265
Step 110: 9265 + 85 = 9350
Step 111: 9350 + 85 = 9435
Step 112: 9435 + 85 = 9520
Step 113: 9520 + 85 = 9605
Step 114: 9605 + 85 = 9690
Step 115: 9690 + 85 = 9775
Step 116: 9775 + 85 = 9860
Step 117: 9860 + 85 = 9945
Step 118: 9945 + 85 = 10030
Step 119: 10030 + 85 = 10115
Step 120: 10115 + 85 = 10200
Step 121: 10200 + 85 = 10285
Step 122: 10285 + 85 = 10370
Step 123: 10370 + 85 = 10455
Step 124: 10455 + 85 = 10540
Step 125: 10540 + 85 = 10625
Step 126: 10625 + 85 = 10710
Step 127: 10710 + 85 = 10795
Step 128: 10795 + 85 = 10880
Step 129: 10880 + 85 = 10965
Step 130: 10965 + 85 = 11050
Step 131: 11050 + 85 = 11135
Step 132: 11135 + 85 = 11220
Step 133: 11220 + 85 = 11305
Step 134: 11305 + 85 = 11390
Step 135: 11390 + 85 = 11475
Step 136: 11475 + 85 = 11560
Step 137: 11560 + 85 = 11645
Step 138: 11645 + 85 = 11730
Step 139: 11730 + 85 = 11815
Step 140: 11815 + 85 = 11900
Step 141: 11900 + 85 = 11985
Step 142: 11985 + 85 = 12070
Step 143: 12070 + 85 = 12155
Step 144: 12155 + 85 = 12240
Step 145: 12240 + 85 = 12325
Step 146: 12325 + 85 = 12410
Step 147: 12410 + 85 = 12495
Step 148: 12495 + 85 = 12580
Step 149: 12580 + 85 = 12665
Step 150: 12665 + 85 = 12750
Step 151: 12750 + 85 = 12835
Step 152: 12835 + 85 = 12920
Step 153: 12920 + 85 = 13005
Step 154: 13005 + 85 = 13090
Step 155: 13090 + 85 = 13175
Step 156: 13175 + 85 = 13260
Step 157: 13260 + 85 = 13345
Step 158: 13345 + 85 = 13430
Step 159: 13430 + 85 = 13515
Step 160: 13515 + 85 = 13600
Step 161: 13600 + 85 = 13685
Step 162: 13685 + 85 = 13770
Step 163: 13770 + 85 = 13855
Step 164: 13855 + 85 = 13940
Step 165: 13940 + 85 = 14025
Step 166: 14025 + 85 = 14110
Step 167: 14110 + 85 = 14195
Step 168: 14195 + 85 = 14280
Step 169: 14280 + 85 = 14365
Step 170: 14365 + 85 = 14450
Step 171: 14450 + 85 = 14535
Step 172: 14535 + 85 = 14620
Step 173: 14620 + 85 = 14705
Step 174: 14705 + 85 = 14790
Step 175: 14790 + 85 = 14875
Step 176: 14875 + 85 = 14960
Step 177: 14960 + 85 = 15045
Step 178: 15045 + 85 = 15130
Step 179: 15130 + 85 = 15215
Step 180: 15215 + 85 = 15300
Step 181: 15300 + 85 = 15385
Step 182: 15385 + 85 = 15470
Step 183: 15470 + 85 = 15555
Step 184: 15555 + 85 = 15640
Step 185: 15640 + 85 = 15725
Step 186: 15725 + 85 = 15810
Step 187: 15810 + 85 = 15895
Step 188: 15895 + 85 = 15980
Step 189: 15980 + 85 = 16065
Step 190: 16065 + 85 = 16150
Step 191: 16150 + 85 = 16235
Step 192: 16235 + 85 = 16320
Step 193: 16320 + 85 = 16405
Step 194: 16405 + 85 = 16490
Step 195: 16490 + 85 = 16575
Step 196: 16575 + 85 = 16660
Step 197: 16660 + 85 = 16745
Step 198: 16745 + 85 = 16830
Step 199: 16830 + 85 = 16915
Step 200: 16915 + 85 = 17000
Step 201: 17000 + 85 = 17085
Step 202: 17085 + 85 = 17170
Step 203: 17170 + 85 = 17255
Step 204: 17255 + 85 = 17340
Step 205: 17340 + 85 = 17425
Step 206: 17425 + 85 = 17510
Step 207: 17510 + 85 = 17595
Step 208: 17595 + 85 = 17680
Step 209: 17680 + 85 = 17765
Step 210: 17765 + 85 = 17850
Step 211: 17850 + 85 = 17935
Step 212: 17935 + 85 = 18020
Step 213: 18020 + 85 = 18105
Step 214: 18105 + 85 = 18190
Step 215: 18190 + 85 = 18275
Step 216: 18275 + 85 = 18360
Step 217: 18360 + 85 = 18445
Step 218: 18445 + 85 = 18530
Step 219: 18530 + 85 = 18615
Step 220: 18615 + 85 = 18700
Step 221: 18700 + 85 = 18785
Step 222: 18785 + 85 = 18870
Step 223: 18870 + 85 = 18955
Step 224: 18955 + 85 = 19040
Step 225: 19040 + 85 = 19125
Step 226: 19125 + 85 = 19210
Step 227: 19210 + 85 = 19295
Step 228: 19295 + 85 = 19380
Step 229: 19380 + 85 = 19465
Step 230: 19465 + 85 = 19550
Step 231: 19550 + 85 = 19635
Step 232: 19635 + 85 = 19720
Step 233: 19720 + 85 = 19805
Step 234: 19805 + 85 = 19890
Step 235: 19890 + 85 = 19975
Step 236: 19975 + 85 = 20060
Step 237: 20060 + 85 = 20145
Step 238: 20145 + 85 = 20230
Step 239: 20230 + 85 = 20315

So, 85*239 = 20315